Process for the production of nylon 6
Abstract
Abstract NYLON-6 HAVING A LOW CYCLIC OLIGOMER CONTENT IS PRODUCED BY HEATING A MIXTURE OF EPSILON-CAPROLACTAM AND WATER (TOGETHER WITH PROPERTY-MODIFYING ADDITIVES AND CHAIN-TERMINATING AGENTS, IF DESIRED) TO EFFECT REACTION OF EPSILON-CAPROLACTAM AT A RATE DETERMINED BY THE MAXIMUM CONCENTRATION OF CYCLIC OLIGMERS DESIRED IN THE PRODUCT, A SLOWER RATE RESULTING IN A LOWER CYCLIC OLIGOMER CONTENT. WHEN LESS THAN ABOUT 45% OF THE EPSILON-CAPROLACTAM IS REACTED AND THE MIXTURE HAS GONE THROUGH A MAXIMUM END GROUP CONCENTRATION, THE RATE OF POLYMERIZATION CAN BE INCREASED AND EVAPORATIVE CONDITIONS CAN BE APPLIED TO REMOVE WATER AND EXCESS MONOMER WITHOUT F URTHER INCREASING THE CONCENTRATION OF CYCLIC OLIGOMERS.
Inventors
- 👤 Ian C Twilley
- 👤 David W H Roth Jr
- 👤 Robert A Lofquist
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
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